Sewing-machine.



PATENTED JUNE 30, 1908..

3. M. JAooBYf SEWING MACHINE. APPLICATION FILED OUT. 2'], 1902- I0 MODEL.

3 SHEETSSHEET 1.

BITS-SHEET 2.

. PATENTED JUNE 30,1903. s. M. JAGOBY. SEWING MACHINE. APPLICATION FILED 00127, 1902.

I0 MODEL lfjlzzmses;

3 \m .8 m 8 IH W h E. Q s

iliviinn SELLMAR hi. JACOBY, F

Patented June 30, 1903.

Ni -3V7 YORK, N. Y.

SPECIFICATION forming part Letters Patent lie. 732,353, dated June 30, 1903. Application filed October 27, 1902. Serial No; 128,877. (No model.)

To all whom it may concern:

Be it known that I, SELLMAR M. JAcosY, a citizen of the United States, and a resident of the borough of Manhattan, in the city and State of New York, have invented new and useful Improvement in Sewing-lilachines, of which the following is a specification.

My invention relates to an improvement in sewing-machines, and is more particularly adapted for use in sewing together pieces of fur.

The object of my present invention is to provide certain improvements in the construction, form, and arrangement of the several parts of a sewing'machine whereby the capacity of the machine is materially increased because of the increased speed thereof and in which the parts are so connected that the liability of their becoming deranged under high speed is materially reduced.

A further object is to provide certain improvements in the construction shown and described in my former patents, No. 559,978, dated May 12, 1896, and No. 562,538, dated June 23, 1896, for sewing-machines, whereby the looper-hook is caused to traverse an easier path than heretofore.

A practical embodiment of my inv represented in the accompanying d in which Figure 1 is a view of the machine in side elevation. Fig. 2 is a top plan view of the machine with the cover removed. Fig. 8 is a vertical central section from front to rear through the machine in the plane of the line A A of Fig. 2. Fig. 4 is a similarview taken in the plane of the line P B of Fig. 2. 5 is a similar view taken in he plane of the line C O of Fig. 2. Fig. 6 is a transverse vertical section taken in the plane of the line D D of Fig. 2. Fig. 7is a diagrammatic view in perspective of the path which the loop-erhook traverses. Figs. 8, 9, 10, and 11 are viewsin detail, showing the needle looperhook in four different positions during the formation of the stitch, the parts of the threads which form the stitch sing shown a wings,

an exaggerated distance apart to completely follow its formation; and Fig. 12 is a detail view showing the manner of adjustably hinging the looper-hook bar to swing vertically.

The body of the machine is denoted by 1,

parts of the machine.

and it is surmounted by a casing 2, of generally oblong form, for the purpose of supporting and housing certain of the operating The top or cover of the casing isdenoted byfi.

The main drivii'ig-shaft is denoted by 4, and it is mounted in suitable bearings in the opposite sides of the casing 2, its opposite ends being provided with hand-wheels 5 and 6, which also serve as balance-Wheels. The shaft i is further provided with a suitable driving-pulley 7 for receiving a suitable driving-band fromasourceofpower. (Notshown) The shaft i carries five cams S 9 1O 11 12. The cam 8 is utilized to impart the vertical swinging movement of the looper-hook bar. The cam 9 is utilized to impart the longitudinallyu'eciproca-ting movement to the looperhook bar. The cam 10 is utilized for imparting a longitndinally-reciprocating movement to the needle-har. The cam 11 is utilized for imparting the laterally-rocking movement to the loop r-hook bar. Thecam 12 is utilized for operating the feed-disk.

The needle-carrying bar is denoted by 13, and it has fixed thereon a depending bifurcated yoke or hanger 14, whichembraces the opposite sides of the cam 10. This bar 13 is mounted in the bearings in the casing 2 and carries the needle 15.

The bar which carries the looper-hook 16 is.

denoted by 17 and is suitably supported to permit it to have a rocking motion on its own axis, a longitudinally-reciprocating movement, and a vertically-rocking movement.

The means for im iartin the rockin movement to the looper-oar 17 is constructed and arranged follows: The bar 17 is provided with a laterally-extended arm 18, which-is engaged at its end by a cam-groove 19 in a rocking plate 20, pivoted on a lug 21 t0 the casing 2 at a point a short distance above the drive-shaft l. This rocking plate is provided with a short arm 22, to which is secured an eccentric-strap 23, embracing the eccentric cam 11 on the driving-shaft. The swinging vertical movement is imparted to the looper-har 17 by the "following means: A bar 2% is fixed to move bodily with the looperhook bar 17 by a cross-bracket 25 at their rear ends exterior to the casing of the machine and by a bearing-sleeve 26 for the looper-hook bar within the said casing. This bar 24 is provided with a laterally-projected pin 27, to which is connected the upper end of a link 23, the lower end of said link being connected to the upper arm 29 of a two-armed lever pivoted at 30 to the casing. The other arm 31 of the two-armed lever is connected to an eccentric-strap 32, surrounding the eccentric cam S on the driving-shaft. The longitudinally-reciprocating movement of the looperhook bar is imparted as follows: A bar 33 is mounted to reciprocate longitudinally in suitable hearings in the casing, to the rear end of which bar is adjustably pivoted the bracket 25 of the bar 24 and looper-hook bar 17. This bar 33 is provided with a depending yoke 34, which embraces the cam 9 on the drivingshaft 4. This pivotal connection is obtained by means ofa block 25*, pivoted to the bracket 25, within which block the end of the bar 33 is adjustably secured by a set-screw 25"? By securing this bar 33 in different longitudinal adjustments with respect to its pivotal connection with the looper-hook bar 17 the relative heights of the limits of the looper-hook can be accurately determined.

The material to be sewed is fed between the adjacent edges of a pair of disks 35 36, located with their upper surfaces in proximity to the path in which the needle 15 reciprocates. The disk 35 is fixed to a spindle 37, which is rotated by means of a clutch mechanism 38, commonly known in the art as a Howe clutch, located in the present instance at the foot of the spindle 37 and operated by a lever 39 and by a cam 12 on the driving-shaft. The disk 36 is free to rotate by the friction imparted to it through the material being operated upon by the positively-driven feed-disk 35. This disk 36 is mounted upon the outer end of a U-shaped presser-bar 40. This disk 36 may be moved away from the disk 35 by the following means: A two-armed rocking lever 41 42 is pivoted at 43 within the casing 2, and the upper arm 42 of the said lever is connected to the inner end of the presser-bar 40 by a connecting-bar 44. The presser-bar is supported vertically, so as to move bodily with the disk 36, by means of a rocking link 45, the upper end of which is pivoted to the inner end of the presser-bar and the lower end of which is pivoted to the casing at the base 1 thereof. A retracting-spring 46 is engaged with the rear wall of the casing and the bar 44, tending to hold the disk 36 against the material with the required pressure. The lower arm 41 of the two-armed lever 41 42 may be connected to any suitable device for swinging the arm 40, with its disk 36, away from the disk 35 against the tension of the spring 46.

In operation, supposing the parts to be in the position shown in Fig. 8, the needle is started on its rearward movement, thereby slackening the thread. The looper-hook is rocked across the needle above the same, thereby taking up the loop of thread formed by the rearward movement of the needle. The looper-hook thus traverses the path from the point 47 to the point 48. (Shown diagrammatically in Fig. 7.) The looper-hook is then caused to travel in a curved path upwardly, rearwardly, and downwardly to the point 49 and from thence inwardly to apoint 50 beneath the needle upon the other side of the material being sewed. \Vhen the looperhook has arrived at its point 50, the needle has been fully withdrawn and now started on its advance movement through the loop, as shown in Fig. 10. The looper-hook is then rocked laterally away from the path of the needle from the point 50 to the point 49. (See Figs. 7 and 11.) The looper-hook is then caused to travel in a curved path upwardly, outwardly, and downwardly to the point 47. The parts which operate the looper-hook are so constructed that the looper-hook is caused to travel constantly in a curved path, thus permitting the machine to be driven at a very high rate of speed.

It is evident that changes might be resorted to in the form, construction, and arrangement of the several parts without departing from the spirit and scope of my invention. Hence I do not wish to limit myself strictly to the structure herein set forth; but

What I claim is 1. In a sewing-machine, a needle,means for reciprocating the needle, a looper-hook bar, means for rocking the bar on its axis, a second bar to which the looper-hook bar is pivoted, means for reciprocating the second bar and thereby the looper-hook bar, a third bar fitted to reciprocate and to swing vertically with the l00perhook bar, and means for swinging the looper-hook bar vertically comprising a driving-shaft, an eccentric thereon, a rocking lever having one arm connected to the eccentric and a link connecting the other arm of the rocking lever to the said third bar, substantially as set forth.

2. In asewing-machine, a needle and means for reciprocating it, a looper-hook bar and means forimparting a longitudinally-reciproeating, laterally-rocking and vertically-rocking movement thereto, a feed-disk and means for positively operating it and a companion disk, a presser-bar therefor, a rocking lever, aconnccting-bar between the presser-bar and one arm of the rocking lever, a spring for the presscr-bar and a' rocking link for supporting the presser-bar in position.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 24th day of October, 1902.

SELLMAR M. JACOBY.

Witnesses:

FREDK. HAYNES, C. S. SUNDGREN.

IIO

IZC 

